64 citations · 234 across the 12 of their papers we have counts for
12 papers
Pion-nucleon sigma term and deeply bound pionic atoms
Natsumi Ikeno, Takahiro Nishi, Kenta Itahashi +3
We investigate the possibility to determine the value of the pion-nucleon sigma term precisely by the experimental observables of the deeply bound pionic atoms. We discuss…
Chiral symmetry restoration at high matter density observed in pionic atoms
Takahiro Nishi, Kenta Itahashi, DeukSoon Ahn +45
Modern theories of physics tell that the vacuum is not an empty space. Hidden in the vacuum is a structure of anti-quarks and quarks . The and pair has t…
Novel multi-layer plastic-scintillator-based solid active proton target for inverse-kinematics experiments
D. T. Tran, S. Terashima, H. J. Ong +11
We have constructed and tested a novel plastic-scintillator-based solid-state active proton target for use in nuclear spectroscopic studies with nuclear reactions induced by an ion…
Spectroscopy of pionic atoms in reaction and angular dependence of the formation cross sections
T. Nishi, K. Itahashi, G. P. A. Berg +36
We observed the atomic and states of bound to nuclei as distinct peak structures in the missing mass spectra of the ${}^{122}{\rm Sn}(d,{}^3{\rm…
Missing-mass spectroscopy of the reaction near the -meson production threshold
Y. K. Tanaka, K. Itahashi, H. Fujioka +51
Excitation-energy spectra of C nuclei near the -meson production threshold have been measured by missing-mass spectroscopy using the C(,) reaction. A…
Measurement of excitation spectra in the C reaction near the emission threshold
Y. K. Tanaka, K. Itahashi, H. Fujioka +51
Excitation spectra of C were measured in the C reaction near the emission threshold. A proton beam extracted from the synchrotron SIS-18 at GSI with an in…
Search for Tetraneutron by Pion Double Charge Exchange Reaction at J-PARC
Hiroyuki Fujioka, Tomokazu Fukuda, Toru Harada +6
Tetraneutron () has come back in the limelight, because of recent observation of a candidate resonant state at RIBF. We propose to investigate the pion double charge exchange…
Spectroscopy of -nucleus bound states at GSI and FAIR --- very preliminary results and future prospects ---
H. Fujioka, Y. Ayyad, J. Benlliure +51
The possible existence of η'-nucleus bound states has been put forward through theoretical and experimental studies. It is strongly related to the η' mass at finite density, which…
Search for η'(958)-nucleus bound states by (p,d) reaction at GSI and FAIR
H. Fujioka, Y. Ayyad, J. Benlliure +51
The mass of the η' meson is theoretically expected to be reduced at finite density, which indicates the existence of η'-nucleus bound states. To investigate these states, we perfor…
Spectroscopy of eta' mesic nuclei with (p,d) reaction
Yoshiki K. Tanaka, Stefan Friedrich, Hiroyuki Fujioka +15
We are going to perform an inclusive spectroscopy experiment of eta' mesic nuclei with the 12C(p,d) reaction to study in-medium properties of the eta' meson. In nuclear medium, the…
Spectroscopy of eta'-nucleus bound states at GSI-SIS
Hiroyuki Fujioka, Kenta Itahashi, Hans Geissel +14
The eta' meson mass may be reduced due to partial restoration of chiral symmetry. If this is the case, an eta'-nucleus system may form a nuclear bound state. We plan to carry out a…
Feasibility Study of Observing eta' Mesic Nuclei with (p,d) Reaction
Kenta Itahashi, Hiroyuki Fujioka, Hans Geissel +13
A novel method is proposed to measure eta'(958) meson bound states in 11C nuclei by missing mass spectroscopy of the 12C(p,d) reaction near the eta' production threshold. It is sho…